diff --git a/pags/AV_principal.php b/pags/AV_principal.php
index 680a1fb..1626fdd 100644
--- a/pags/AV_principal.php
+++ b/pags/AV_principal.php
@@ -1,6 +1,17 @@
-<?php include ("../includes/header_aula.php");
+<?php 
+session_start();
+//Validar si se está ingresando con sesión correctamente
+if (!isset($_SESSION['user'])){
+echo '<script language = javascript>
+alert("Sesion invalida");
+self.location = "loginAdmin.php";
+</script>';
+}
+else
+{
+include ("../includes/header_aula.php");
     include("../includes/inheader.php");
-    $id_alumno=1;
+    $id_alumno=$_SESSION['user'];
     $peticion="select id_seccion, nombres, apellidos,grado from alumno where id=".$id_alumno."" ;
     $resultado=mysqli_query($conexion,$peticion);
     $fila=mysqli_fetch_array($resultado);
@@ -124,5 +135,5 @@
 </aside>
 
 <?php include("../includes/footer2.php");
-//hola
+}
 ?>
\ No newline at end of file
diff --git a/pags/av_contenido.php b/pags/av_contenido.php
index 96e103e..3d4d21e 100644
--- a/pags/av_contenido.php
+++ b/pags/av_contenido.php
@@ -1,4 +1,15 @@
-<?php include ("../includes/header_aula.php");
+<?php 
+session_start();
+//Validar si se está ingresando con sesión correctamente
+if (!isset($_SESSION['user'])){
+echo '<script language = javascript>
+alert("Sesion invalida");
+self.location = "loginAdmin.php";
+</script>';
+}
+else
+{
+include ("../includes/header_aula.php");
     include("../includes/inheader.php");?>
 
 
@@ -9,7 +20,7 @@
 <?php
 	
 if (isset($_POST)) {
-         $idd= $_POST['id'];
+         $idd= $_SESSION['user'];
 
          $abc = "SELECT nombre FROM materias where id='".$idd."'";
     $resultao10=mysqli_query($conexion,$abc);
@@ -171,5 +182,6 @@
 
 
      }
+ }
 ?>
      
\ No newline at end of file